gform.addFilter('gform_calculation_result', function( result, formulaField, formId, calcObj ) { if ( formId == '86' && formulaField.field_id == '3' ) { var exponent = calcObj.replaceFieldTags( formId, '{:2}', formulaField ), num = calcObj.replaceFieldTags( formId, '{:1}', formulaField ); result = Math.log( num ); } return result; } );